Use "recover partition" to recover files from buffalo external hard drive not recognized windows 10 partition,lost partition,changed ,damaged partition.And if the size or position of partition is changed by format,It can not recover with "unformat"so you can use "recover partition"mode.

Use "Full Scan" to recover data from buffalo external hard drive not recognized windows 10 which can not be found with "undelete" and "unformat" and "recover partition",after showing an error,display as raw file system,unformatted,unknown partition,unpartitioned,needs to be formatted,or the file system is not exfat,not fat32,not ntfs.